<?php

/**
 * @file
 * Contains the base row style plugin.
 */
/**
 * @defgroup views_row_plugins Views' row plugins
 * @{
 *
 * Row plugins control how Views outputs an individual record. They are
 * tightly coupled to style plugins, in that a style plugin is what calls
 * the row plugin.
 *
 * @see hook_views_plugins
 */

/**
 * Default plugin to view a single row of a table. This is really just a wrapper around
 * a theme function.
 *
 * @ingroup views_row_plugins
 */
class views_plugin_row extends views_plugin {

    /**
     * Initialize the row plugin.
     */
    function init(&$view, &$display, $options = NULL) {
        $this->view = &$view;
        $this->display = &$display;

        // Overlay incoming options on top of defaults
        $this->unpack_options($this->options, isset($options) ? $options : $display->handler->get_option('row_options'));
    }

    function uses_fields() {
        return !empty($this->definition['uses fields']);
    }

    function option_definition() {
        $options = parent::option_definition();
        if (isset($this->base_table)) {
            $options['relationship'] = array('default' => 'none');
        }

        return $options;
    }

    /**
     * Provide a form for setting options.
     */
    function options_form(&$form, &$form_state) {
        if (isset($this->base_table)) {
            $view = &$form_state['view'];

            // A whole bunch of code to figure out what relationships are valid for
            // this item.
            $relationships = $view->display_handler->get_option('relationships');
            $relationship_options = array();

            foreach ($relationships as $relationship) {
                $relationship_handler = views_get_handler($relationship['table'], $relationship['field'], 'relationship');

                // If this relationship is valid for this type, add it to the list.
                $data = views_fetch_data($relationship['table']);
                $base = $data[$relationship['field']]['relationship']['base'];
                if ($base == $this->base_table) {
                    $relationship_handler->init($view, $relationship);
                    $relationship_options[$relationship['id']] = $relationship_handler->label();
                }
            }

            if (!empty($relationship_options)) {
                $relationship_options = array_merge(array('none' => t('Do not use a relationship')), $relationship_options);
                $rel = empty($this->options['relationship']) ? 'none' : $this->options['relationship'];
                if (empty($relationship_options[$rel])) {
                    // Pick the first relationship.
                    $rel = key($relationship_options);
                }

                $form['relationship'] = array(
                    '#type' => 'select',
                    '#title' => t('Relationship'),
                    '#options' => $relationship_options,
                    '#default_value' => $rel,
                );
            } else {
                $form['relationship'] = array(
                    '#type' => 'value',
                    '#value' => 'none',
                );
            }
        }
    }

    /**
     * Validate the options form.
     */
    function options_validate($form, &$form_state) {
        
    }

    /**
     * Perform any necessary changes to the form values prior to storage.
     * There is no need for this function to actually store the data.
     */
    function options_submit($form, &$form_state) {
        
    }

    function query() {
        if (isset($this->base_table) && isset($this->options['relationship']) && isset($this->view->relationship[$this->options['relationship']])) {
            $relationship = $this->view->relationship[$this->options['relationship']];
            $this->field_alias = $this->view->query->add_field($relationship->alias, $this->base_field);
        } else {
            $this->field_alias = $this->view->base_field;
        }
    }

    /**
     * Allow the style to do stuff before each row is rendered.
     *
     * @param $result
     *   The full array of results from the query.
     */
    function pre_render($result) {
        
    }

    /**
     * Render a row object. This usually passes through to a theme template
     * of some form, but not always.
     */
    function render($row) {
        return theme($this->theme_functions(), $this->view, $this->options, $row, $this->field_alias);
    }

}

/**
 * @}
 */

